About: http://webisa.webdatacommons.org/383427095

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The type three, systems involve inks which use, as pigment, a crystalline material such as graphite or sulfides or selenides, including MoS2, PbS, FeS2, CoS, Ni3 S2, SnS2, ZrS2, possessing delocalized electrons.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com